Question

How do you find the x and y intercepts for `y=-2`?

Answer 1

You have only the `y` intercept at the point of coordinates:
`x=0`, `y=-2`

Explanation:

Your equation represents a perfectly horizontal line passing through `y=-2` and not crossing the `x` axis.
Graphically:
graph{0x-2 [-10, 10, -5, 5]}